 /*******************************************************************************
  * Copyright (c) 2003, 2004 IBM Corporation and others.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
  * http://www.eclipse.org/legal/epl-v10.html
  *
  * Contributors:
  * IBM Corporation - initial API and implementation
  *******************************************************************************/
 package org.eclipse.test.internal.performance;

 import java.util.Map ;

 import org.eclipse.test.internal.performance.data.Dim;
 import org.eclipse.test.internal.performance.data.Scalar;


 class PerformanceMonitor {
     
     private static PerformanceMonitor fgPerformanceMonitor;

     public static PerformanceMonitor getPerformanceMonitor() {
         if (fgPerformanceMonitor == null) {
             String os= System.getProperty("os.name"); //$NON-NLS-1$
 if (os.startsWith("Windows")) //$NON-NLS-1$
 fgPerformanceMonitor= new PerformanceMonitorWindows();
             else if (os.startsWith("Mac OS X")) //$NON-NLS-1$
 fgPerformanceMonitor= new PerformanceMonitorMac();
             else
                 fgPerformanceMonitor= new PerformanceMonitorLinux();
         }
         return fgPerformanceMonitor;
     }

     protected void collectOperatingSystemCounters(Map scalars) {
         if (PerformanceTestPlugin.isOldDB()) {
             addScalar(scalars, InternalDimensions.SYSTEM_TIME, System.currentTimeMillis());
         } else {
             Runtime runtime= Runtime.getRuntime();
             //runtime.gc();
 addScalar(scalars, InternalDimensions.USED_JAVA_HEAP, runtime.totalMemory() - runtime.freeMemory());
         }
     }

     protected void collectGlobalPerformanceInfo(Map scalars) {
         // no default implementation
 }
     
     void addScalar(Map scalars, Dim dimension, long value) {
         scalars.put(dimension, new Scalar(dimension, value));
     }
 }

